Gas-engine



No Model.) s sheets-sneek; 1.

J. FROBLIGH.

GAS ENGINE.

No. 550,266. Patented Nov. -26, 1895i hilllllllmllllll liga E IJ I 'di l lu Hl J Y Iv ml\llllllllllllll @@n n SDM l fm/Maw" l (No Model.) 3 sheets-Sheen 2.

J. PROELIQH,

'GAS ENGINE.

No.` 550,266. APatented Nov. 26,l 1895.

(No Model.) Q sheets-sheet 3.

/Q J. PROELICH.

GAS ENGINE.

N0.55o,266. Y Patented Nov.26,1895.

ANDREWJRMMP/l. PHOTOLITHQWASHINGTUKDU.

UNITED STATESy PATENT FFICE.

JOHN FROELICH, OF FROELICH, IOVA.

GAS-ENGINE.

SPECIFICATION forming` part of Letters Patent No. 550,266, dated November 26, 1895. I

Y Application led February 23, 1893. Serial No. 463 ,300. (No model.)

.To all whom t may concern.-

Be it known that I, JOHN FROELICH, a citizen of the United States, residing at Froelich, in the county of Clayton and `State of Iowa, have invented a new and useful Improvement in Gas or Explosive Engines, of which the following is a specification.

The objects of my invention are to provide a better governing apparatus and mechanism for supplying the gasoline to the carburetor when gasoline is used; and the invention consists in the mechanical elements and combinations set forth in the claims hereof.

Figure l is a side view of the engine down to the bed-plate or supporting-frame. Fig. 2 is a plan view. Fig. 3 is a side sectional view. Fig. 4. is a sectional view through the cylinder and carburetor on the line y y. Fig. 5 is a side view showing the exhaust-valve mechanism inv one position. Fig. 6. is the same with it in another position. Fig. 7 is the same with it in another position. Fig. 8 is a sectional view through the carburetor supply-valve. Fig. 9 is an end sectional view of the same.

In the drawings, A designates the supporting-casting, and A the bearings supporting the engine-shaft B, with its crank B. On this shaft B there is a band-wheel B2, from which bya band the governor is driven, and on this shaft B there is a cam B3, actuating the exhaust-valve, and there is also a cam B4, actuating the electrical sparking device. Supported on the frame Aby posts a there is a cylinder-casting C,which is water-jacketed, having the water-cavity C,with entrance and exit pipes C2 C3. In this cylinder C there is the ordinary gas-engine piston C4, connected by pitman C5 to crank B. From the top of the cylinder Cthere is apassage-wayC, leading to the exhaust and supply valves.

The ordinary action of a gas engine is what is termec four-cycle --that is,ona downward movement of the piston the suction thereby created lls the cylinder with the explosive gas and on the upward movement this is compressed and at the proper moment is Aenploded, which drives down the piston, and on the following upward movement the burned gases are exhausted out ofv the cylinder, when the same action .again occurs, so the engine takes gas only at every other down stroke, and

in governing the engine it has been found best to give the engine a full supply of gas at'each explosion and limit the speed of the engine by limiting the explosions, so the governor governs by `cutting off entirely the gas supply.

This engineis here shown as being supplied by gas generated from gasoline, but any suitable gas may be used, and the gas is exploded by an electric sparker E, which is mounted on a shaft e and is connected to one pole of an electric battery and revolves past the end of the other pole E of the battery, and the shaft c is driven by aratchet Eidriven by apawl E3, held in engagement by spring c3 and pivoted at c to a lever E4, pivoted at e2to the frame A and carrying a roller E5, working on cam-Wheel B4. The gas-supply valve is designated by G and isoperated by suction like any ordinary suction-pump valve, the suction of the cylinder lifts it and it is held down by a spring G on its stem g, and the spring is adjusted by nuts g4. This valve opens to cavity G2 leading to the carburetor, and its entrance to the carburetor has a check-valve G3 to insure safety against the explosion passing to carburetor. The carburetor is composed of a vertical cylinder D, across which at intervals there are fixed a series of wire-gauze screens d, and it is open at the base, around which there is a basin D larger than the cylinder D and open to the outer air. The object of the basin is to catch any non-volatile oil that may pass the carburetor.

D2 designates the gasoline-supply pipe, which connects toa valve F in the .top of the carburetor. This valve is shown in Figs. 4, 8, and 9 and consists of a chamber F', which measures the supply of gasoline discharged into the carburetor for making gas for one explosion. The size of this chamber is regulated by the plug F2, which is threaded into the chamber F' and adjusted by the rosette- Wheel F3. This chamber F is opened to be filled from the pipe D2, and opened to be emp-A p tied to the carburetor by the oscillating valveblock F4, which has a chamber f opening and closing the chamber F to the pipe D2, 'and has a chamber f opening and closing entrance to carburetor. In the position shown in the drawings, the chamber F is being filled by the pipe D2; but by the oscillation of the IOO blocks F4 this entrance is closed and the chamu ber F opened to the carburetor, and the gasoline drops on the screens d, and the air passing up through by the suction of cylinder, converts the gasoline into gas. The exhaustvalve is shown as I-I, with its stem h, and is held down by a spring H', working against a block 7L on the stem h. The lower end of the stem 7L is held by a keeper h2. This valve II is lifted every other stroke by the rod I, pivoted at /L to a link I, pivoted at t" to post a, and carries a roller I2, working on cam-wheel B3. The upper end 'i2 of the rod I.is guided to alternately strike and miss the valve-stem h bythe roller I3, guided in ways i3 i4, xed in position from the cylinder-casting, and guided on said ways by a spring 5, attached to a rocking block I4, which is pivoted at i6, Fig. 3, to the cylinder-casting C. This block I4 is locked in its position by a spring-actuated lockingbar I5, pivoted at il to the cylinder-casting, an d is held down by spring i8 and has notches i9 @'10, into which a projection fil? of rocking block I'l engages.

The position of the rod I in Fig. l isat the point of commencing its upward stroke when it strikes the valve-rod 7L and lifts the valve II, making the exhaust.

Fig. 5 shows the position of the rod I on its return movement, but not quite home. The rod I in passing' up as in Fig. l is guided by the roller I3, guided by ways fi and spring to strike the valve-rod 7L, and in passing up a projection @'13 on rod I strikes projection i12 on rocking block I and rocks it from the position shown in Fig. 7 to that shown in Figs. 5 and (i, in which movement the spring springs from contact with the way t4 to that of i3, and on the descent of the rod the spring yields and lets the roller I3 pass by, and on the upward stroke, Fig. G, guides it up against the way t, when the end of the rod I will miss the valve-rod 7L and make no exhaust; but in passing up on the stroke Fig. G the projection 14 will strike projection 15 and thereby rock the block 'i4 to position of Fig. 7 from Figs. 5 and G, and on return the spring yields and lets the roller i3 pass. Thus every other stroke the rod I strikes the valve-stem h and lifts the exhaust-valve and eifects the exhaust.

The governor K is here shown as that of an ordinary ball-governor driven by a belt 7c from the engine-shaft, and in governing lifts the arm K of a lever pivoted at k2 on the cylinder-easting and provided with a locking projection 7c3, which by the action of the governor is advanced to engage the projection h on the valve-stem h and hold open the exhaust-valve during the time the speed exceeds that desired. Thus as the exhaust-valve is held open the suction of the piston draws in the outer air through the exhaust port and does not draw a supply of gas for a new explosion. This drawingin andout of the outer air is a desideratum, as it cools the cylinder and permits a free action of the engine, giving no strain to resist the engine orto displace the valve mechanism.

In other engines where the valves are operated regularly by positive mechanism the cutting o of the gas supply causes the engine to pump against closed valves, producing resistance to the motion of the engine, and puts strains on the valve mechanism not otherwise produced. The gasoline-supply valve F is operated by an arm f2 on its axis, pivoted to a link f3, pivoted to lever f4, pivoted at f5 to cylinder-casting, which lever f4 engages a proj ection f6, Fig. 3, on exhaust-valve stem 7L. Thus the action of the exhaust-valve operates the supply of gasoline to the carburetor, and as the exhaust-valve is controlled by the governor, so the supply of gasoline is controlled by the governor. I'Ieretofore in engines of this class the gasoline supply to the carburetor has been regulated by a throttle valve adjusted by the operator to supply an average uniform flow sufficient for the-work of the engine and at the interval that the governor shuts off the gas supply to the cylinder the gasoline keeps running to the carburetor, and

then the next charge of gas to the engine is heavier than the regular charge and does not produce as good a result, and the governor governs only the speed of the engine and does not, by shutting oif the gas supply, save in the consumption of gasoline, while with our mechanism the amount of gasoline to make an explosion is regulated by the operator by the adjustment of the size of the chamber F', and this is emptied into the carburetor under the control of the governor; so if no gas is taken no gasoline is supplied to the carburetor, which is a desideratum.

What I claim is-` l. The combination with the engine cylinder and piston, of a carburetor, a chamber of adjustable capacity for holding a charge for the carburetor, an exhaust valve, means for operating the latter, a governor arranged to hold said valve open when the speed is too great, and mechanism operated by the movement of said valve to empty said chamber into the carburetor.

2. The combination with an engine cylinder, an ignition chamber, an intermediate passage, a carburetor, and a source of supply, all communicating in sequence, of suction-operated valves between the chamber and passage and between the passage and carburetor, a mechanically operated valve between the carburetor and source of supply, an exhaust valve opening said chamber, an engine governor, and devices whereby the governor at high speed holds the exhaust valve open and prevents the opening of said mechanically operated valve.

3. A gas engine having valve operating mechanism consisting essentially of a cam B3 a rod I a rocking block I4 pivoted to the engine frame, mechanism for shifting the posi- IIO tion of block Iy1 at every revolution of the engine and mechanism for locking block I4 in 1o stem h, at every alternate revolution of the engine, by mechanism pivoted to the engine frame and oscillated at every stroke of the rod I as shown.

In Witness whereof I have hereunto subscribed my name in the presence of tWo Wit- I5 nesses.

JOHN FROELICH. Witnesses:

S. M. BROWN, A. G. BROWN. 

